OptiFinedOptiFined
Minecraft 1.21.11
26.3
26.3upcoming
26.2
26.2upcoming
26.1
26.1.226.1upcoming
1.21
1.21.111.21.101.21.91.21.81.21.71.21.61.21.41.21.31.21.11.21
1.20
1.20.61.20.41.20.21.20.11.20
1.19
1.19.41.19.31.19.21.19.11.19
1.18
1.18.21.18.11.18
1.17
1.17.11.17
1.16
1.16.51.16.41.16.31.16.21.16.1
1.15
1.15.2
1.14
1.14.41.14.31.14.2
1.13
1.13.21.13.11.13
1.12
1.12.2

Downloads for OptiFine for Minecraft 1.21.11

Available

Official OptiFine download link for Minecraft 1.21.11, with shader support and Forge compatibility notes.

Latest build

OptiFine 1.21.11 HD U J9

2026-02-05Minecraft 1.21.11
AvailableShadersForge
Download

Compatibility

OptiFineMinecraftDateShadersForgeDownloads
OptiFine 1.21.11 HD U J91.21.112026-02-05✓✓Downloads

Forge: Compatible when installed with the correct Forge version. Compatibility can vary by Minecraft and OptiFine build.

Changelog

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Installation guide

Follow these steps to install OptiFine for Minecraft 1.21.11:

  1. 1Run Minecraft 1.21.11 once in the official Launcher to make sure the version files are downloaded.
  2. 2Click Download on this page and wait for the OptiFine 1.21.11 HD U J9 .jar file.
  3. 3Double-click the downloaded .jar file — the OptiFine installer opens. Click Install.
  4. 4Open the Minecraft Launcher and pick the new OptiFine 1.21.11 profile from the dropdown next to the Play button.
  5. 5Press Play. Open Options → Video Settings to fine-tune performance and shaders.

Recommended guides

About OptiFine for Minecraft 1.21.11

Minecraft 1.21.11 "Mounts of Mayhem" was released on December 9, 2025 as a full game drop for Java Edition. It brings nautilus and zombie nautilus mobs, nautilus armor and spears, netherite horse armor, camel husks and zombie horsemen. OptiFine 1.21.11 is built for this exact game version, so shaders, HD textures, connected textures and the FPS boost options match vanilla 1.21.11 behaviour.

OptiFine for Minecraft 1.21.11 brings the full OptiFine feature set to this version: smoother framerates, shader pack support, HD texture handling, dynamic lights, connected textures, and a deeper Video Settings menu. The matching build is OptiFine 1.21.11 HD U J9.

If you also use mods, install Forge for Minecraft 1.21.11 first, run it once, then drop the OptiFine .jar into your mods folder. Mismatched Minecraft versions between Forge and OptiFine are the most common cause of crashes.